Electric mattress heater



Aug. 21, 1951 D. MITNOWSKY- 2,565,390

ELECTRIC MATTRESS HEATER Filed Dec. 28, 1949 INVENTOR.

ATTORNEY Patented Aug. 21, 1951 UNITED STATES PATENT OFFICE ELECTRICMATTRESS HEATER David Mitnowsky, Newark, N. J.

Application December 28, 1949, Serial No. 135,435

1 Claim.

My invention relates generally to mattress heaters and specifically tothat type having electrically energized heat generating elements.

It is among the objects of my invention to provide a mattress heaterthat is safe.

It is another object of my invention to provide a mattress heater thatgenerates heat and readily disseminates it throughout the mattress.

Yet another object of my invention is to provide a mattress heater thathas a large radiation area.

Among the objects of my invention is to provide a mattress that issimple in form, durable, inexpensive, easy to construct and maintain.

These objects and advantages, as well as many other objects andadvantages, may be attained by the device illustrated in the drawings,in which:

Figure 1 is a View in perspective of my mattress heater with the topplate raised;

Figure 2 is a view in perspective with the top plate closed; and

Figure 3 is a plan view showing the mattress heater in a mattress.

Referring now to the drawings in detail, my mattress heater has a topradiation plate II and a bottom radiation plate I2. These plates areattached together by hinges I3 affixed to their longitudinal edges. Theplates II, I2 are constructed of flexible metallic sheets, althoughother materials may be used. The plates are provided with many radiationholes I4 to permit the circulation of air between them.

Resistance wires I5 are enclosed between the plates. These wires havecharacteristics which will cause them to give 011 heat when electricallyenergized. Mounted on and completely covering each wire I5 are glassbeads I6. They serve to insulate the wires and yet permit the radiationof the heat generated. Covering the beads are tubes I! formed of goodheat conducting material such as copper, aluminum, or the like. Thetubes I! are fastened to one of the plates l2, at appropriate intervals,by cleats [8. The ends of the wires are connected to a plug I9 whichwill receive another plug connected to the power source.

The tubes I1 are arranged as will appear from Figure 1. Between thetubes, a brace or rectangular slat is attached to one of the plates I I,I2 by hinges 21. A slotted handle is attached to the slat 20 by twoscrews 26 so that it may slide outwardly to the position indicated inFigure 2.

In use, a mattress 2| is constructed with its equatorial springs 22split into equal halves as will appear in Figure 3. The mattress heateris placed between the halves of the springs 22. A zippered opening 23 inthe mattress cover 24 gives access to the handle 25 and also permits theintroduction of the power line.

When the slat 20 is down, as in Figure 1, it may be raised to theposition shown in Figure 2, whereupon greater air circulation ispermitted between the plates 1 I, I2. This also permits the removal ofthe sag that may occur in the center of the mattress, due to theflattening of the springs 22. A thermostat may be included within themattress 2| to retain the degree of heat within the desired range.

I have referred to glass beads I6 as covering the wires. These beadsneed not necessarily be of glass but may be of some material which is agood conductor of heat. Preferably, they should be circular in form soas to keep the Wires from contacting any parts of the plates II, I2 andyet have the greatest radiating area to permit the heat to be freelycirculated to all corners of the mattress.

Many other changes may be made in the construction, selection andarrangement of the various parts comprising my mattress heater, allwithin the scope of the appended claim, without departing from thespirit of the invention.

I claim:

A mattress heater comprising a resilient top plate, a resilient bottomplate pivotally attached to the top plate along its longitudinal edges,a brace pivotally attached to one of the plates, a handle slidablyattached to the brace, a resistance wire disposed between the plates,beads covering the wire, a tube of heat conducting material covering thebeads, means attaching the tube to one of the plates, and a plurality ofholes in the plates.

DAVID MITNOWSKY.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 700,494 Hinman May 20, 1902873,317 Landry Dec. 10, 1907 926,695 Frost June 29, 1909 1,429,865Friedman Sept. 19, 1922 1,835,602 Kercher et a1. Dec. 8, 1931 1,957,401Wiedenmann May 1, 1934 1,984,008 Baker Dec. 11, 1934 1,989,502 BeckerJan. 29, 1935 1,994,759 Dermott Mar. 19, 1935 2,162,021 Kidwell June 13,1939 2,215,042 Howard et a1 Sept. 17, 1940 2,287,569 Premack June 23,1942 FOREIGN PATENTS Number Country Date 711,070 France June 16, 1931716,129 France Dec. 15, 1931

